We want Sharepoint and WSUS (update services) to run on one machine running MS Server 2003. Apparently WSUS is going to have to have priority for port 80 and I've changed the port for SP to 81.

If I manually type in the server and port I go right to the SP home page but I saw a mention somewhere that an A record could be created that would translate a simple name to the complex one with the port number.

I'm still too n00b at DNS to figure this out and I don't want to screw up what is already functioning properly! Or if I'm missing something else entirely re: IIS I'm open...

I agree, changing the WSUS port should be fairly easy, especially if you have a GPO in place to configure servers and workstations.
In answer to the DNS entry question, I believe you may want to try a Service Location record, or SRV record.
I have not used this method, but it should work for you.
As a third option, using Host Headers within IIS may also do the trick.

I agree, changing the WSUS port should be fairly easy, especially if you have a GPO in place to configure servers and workstations.
In answer to the DNS entry question, I believe you may want to try a Service Location record, or SRV record.
I have not used this method, but it should work for you.
As a third option, using Host Headers within IIS may also do the trick.

DNS A Recods cannot do anything with a port number. This is mentioned a lot but it is an "old wives tale" - the DNS system does not support this. There is no concept of ports in the DNS standard. It is an IP to Hostname mapping service, not a layer four intelligent service.

You are completely correct. I should have clarified when I said that DNS does not understand port numbers. The traditional use of DNS (A, C, PTr) does not use port numbers and port numbers cannot be used in the way specified - to redirect a web site to another port. Web browsers do not look up services but do hostname resolution.

Excellent! Host headers was what I was thinking of, but the GPO is where I really needed to concentrate. I haven't been here that long, having spent a looonnngg time in an NT shop so I still lose sight of all the options available.

The default GPO specified the IP of the server that has been hosting WSUS, so I just updated that, bookmarked the WSUSAdmin page using the port 8001 for myself, and voila, both default Sharepoint and WSUS admin pages work and come tomorrow I should see the workstations chatting w/ the new WSUS installation.

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I'm sure IIS can do a normal redirect of the request in the same way Apache does. You could also simply make a virtual host for your Sharepoint service, instead of putting it on a different port because that is clumsy.

Yes, virtual hosts allow you to have more than one website on port 80 on a given machine!

IIS is able to direct the request to the correct virtual host by inspecting the header of the HTTP request.

Yes, hostheaders allowing multiple services on port 80 on a single web server is how the bulk of websites are served. This must be more common than not. IIS handles this automatically and Apache with only the slightest of configuration. Very very simple.

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